The Taco Truck said it was coming to Boston in a big way, and so far it has delivered on that promise. After starting service in Cambridge, the New Jersey-based company now tweets that it's bound for Boston proper. TTT says it will be parked at City Hall Plaza today from 11am to 5:30pm. Earlier the company said it planned to "develop multiple locations in the Boston Market quickly." The big question is when and where it plans to put down anchor: an image on the company's website (above) says that a brick-and-mortar is also in the works.